Calculation of the process of cold extrusion of tubes from metal powders. I. Direct extrusion

1989 ◽  
Vol 28 (3) ◽  
pp. 160-163
Author(s):  
A. V. Stepanenko ◽  
L. A. Isaevich ◽  
A. A. Veremeichik
Keyword(s):  
Cold Extrusion ◽  
Metal Powders ◽  
Direct Extrusion

scholarly journals Process modeling of sequential radial-direct extrusion using curved triangular kinematic module

2021 ◽  
Vol 49 (1) ◽  
pp. 56-63
Author(s):  
Natalia Hrudkina
Keyword(s):  
Process Modeling ◽  
Deformation Process ◽  
Metal Flow ◽  
Vertical Component ◽  
Radial Component ◽  
Cold Extrusion ◽  
Direct Extrusion ◽  
Relative Strain ◽  
Power Mode ◽  
Theoretical Results

In this article new engineering calculations such as the value of the relative strain pressure for the combination of a triangular kinematic module with external modules of various configurations are developed. This allowed us to describe qualitatively the nature of the metal flow in the reversal zone before radial extrusion. This made it possible to achieve a decrease in the predicted assessment of the power mode for the deformation process with comparison by the use of rectangular modules. The greatest reduction in the value of the relative strain pressure corresponded to a combination with an adjacent rectangular module (with the missing vertical component CPVF) and can obtain 7-8%. The deviation of the theoretical results in the power parameters of the process by using a triangular kinematic module are 12-15% for a process with a developed flow radial component. The resulting calculations can be used to model new cold extrusion processes.

Production of bottom flange shells by cold extrusion on specialized press

2021 ◽  
pp. 450-458
Author(s):  
A.M. Dmitriev ◽  
N.V. Korobova
Keyword(s):  
Cold Extrusion ◽  
Outer Diameter ◽  
Bottom Flange ◽  
Technological Solution ◽  
Shell Wall ◽  
Corrosion Resistant ◽  
Direct Extrusion ◽  
Intractable Problems

The possibility for manufacturing by cold extrusion of part such as shells made of corrosion-resistant and higstemperature steel is evaluated. It is shown that when extrusion such parts using combination of direct extrusion from workpiece with diameter equal to the diameter of the flange, followed by direct extrusion of the shell wall, number of intractable problems arise. Some of these problems relate to the design of production die to be fitted to mass produced standard presses. It is proposed to manufacture parts of the type using combination of extrusion of the shell walls from workpiece with diameter equal to its outer diameter, with simultaneous radial extrusion of the flange. Such technological solution can be implemented on domestic specialized presses.

Calculation of the process of cold extrusion of tubes from metal powders. II. Reverse extrusion

1989 ◽  
Vol 28 (5) ◽  
pp. 355-358
Author(s):  
A. V. Stepanenko ◽  
L. A. Isaevich ◽  
A. A. Veremeichik
Keyword(s):  
Cold Extrusion ◽  
Metal Powders
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